Table Of Content

ME 114 Computer Aided Engineering Drawing - II Asst.Prof.Dr.Turgut AKYÜREK Çankaya University, Ankara Assembly Drawing Exercises 2/57 Working Drawing/Production Drawing  The drawings that are used to give information for the manufacture or construction of a machine or structure are called as working drawings or production drawings. T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises http://www.linmech.co.uk/detail.html 3/57 Working Drawing  Working drawings must include all the knowledge for the production of a machine or structure explicitly so that no further information is required to complete the production. T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 4/57 Working Drawing  Working drawings are specialized engineering drawings that provide information required to make the part or assembly of the final design. •May be more than one sheet. •Includes -Assembly drawing -Detail drawings of non-standard parts -Parts list T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 5/57 Assembly Drawing  An assembly drawing shows how each part of a design is put together.  If the design depicted is only part of the total assembly, it is referred to as subassembly. http://www.robspencerdesign.co.uk/13912.html T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 6/57 Constructing an Assembly  Constructing an assembly begins with bringing in a base component. A base component will be selected because of its central role in defining the overall assembly.  Each successive component brought in needs to be oriented and located relative to other components in the assembly.  Location and orientation is achieved by defining geometric relations between geometric elements of a component in the assembly and elements of components beeing brought in. T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 7/57 Content of Working Drawings for an Assembly  An assembly or subassembly drawing showing all the standard and nonstandard parts in a single drawing, drawn in their operating position  A parts list or bill of materials, showing – detail number for each part, – the quantity needed for a single assembly, – the description or name of the part, – catalog number if it is a standard part, – and the company part number  A title block  Detail drawings of each nonstandard part T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 8/57 Assembly Drawing Content  All the parts drawn in their operating position  A parts list or bill of materials, showing – detail number for each part, – the quantity needed for a single assembly, – the description or name of the part, – catalog number if it is a standard part, – and the company part number  Leader lines with balloons, assigning each part a detail number, in sequential order and keyed to the list of parts in the parts list  Machning and assembly operations and critical dimensions related the functions. T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 9/57 Standard Parts  Standards parts are commonly used in assemblies. – Threaded fasteners – Non-threaded fasteners – Gears – Keys T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 10/57 Kinds of Assembly Drawings  Pictorial assembly drawings  Outline assembly drawings  Sectioned assembly drawings T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 11/57 Kinds of Assembly Drawings Pictorial assembly drawings These drawings are very useful to indicate the method of assembly, and are often used in technical manuals. Outline assembly drawings Sectioned assembly drawings T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises A Model Created as an Illustration for Maintenance Handbooks 12/57 Pictorial Assembly Drawings  Pictorial assembly drawings give general graphic description of each part and uses center lines to show how the parts are assembled.  The pictorial assembly is normally an isometric view and is used in installation and maintenance manuals. T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 13/57 Pictorial Assembly Drawings  With 2-D CAD, pictorial assembly drawings can be created using traditional techniques. A 3-D CAD model also can be used to render and create pictorial assemblies by positioning each part in a pictorial view.  Center lines and a parts list are added to complete the drawing. T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises 14/57 Kinds of Assembly Drawings  Pictorial assembly drawings  Outline assembly drawings – give general graphic description of the exterior shape. – are used for parts catalogs and installation manuals, or for production if the assembly is simple. T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises – Therefore, keep number of views minimum necessary to describe the assembly. – It is common to have a single orthographic assembly view, such as the front view. Sectioned assembly drawings 15/57 Outline Assembly http://odin.me.memphis.edu/ugs_docs/NX3/draftingeff/drawing_types/inprocess_drawings.html Fixture Assembly T.Akyürek ME 114 Computer Aided Engineering Drawing II– Assembly Drawing Exercises